The news came as the leaders of seven wealthy democracies known as the G7 wrapped up a summit in Germany with a call for “decarbonization of the global economy over the course of this century.” The plan contains few binding provisions or concrete details. As about 20,000 police kept protesters at bay, Greenpeace projected its demands onto a mountain near the castle where leaders were meeting. The message read: “G7 Go for 100 Percent Renewables.”